I can find no relevant recent updates not covered by this late 2021 article.

It includes the 2021 update which expanded the PCA’s coverage to include the Navy, Marine Corps, and Space Force, in addition to the Army and Air Force, and the Modernization of Military Guidance in 2019 when The Department of Defense updated its internal guidance on the PCA, reflecting evolving interpretations and regulatory practices.

Not yet enacted into law: Strengthening the Posse Comitatus Act of 2020 (H.R. 7297) was introduced in the House in June 2020 to further expand the PCA’s applicability to all branches of the Armed Forces and prohibit the use of evidence obtained in violation of the Act.